Sunday, April 23, 2023

Methane may not warm the Earth quite as much as previously thought

Good news! More confirmation that climate models are junk! Unfortunately, this latest research is also based on model simulations!

The renewable energy/global warming/climate change is the greatest scam perpetrated on humanity of our time. It’s big business and big government!

"It heats Earth’s atmosphere 28 times as potently as carbon dioxide, gram for gram. But its absorption of the sun’s radiation high in the atmosphere also alters cloud patterns — casting a bit of shadow on its warming effect. ...
methane’s solar absorption sets off a cascade of events that reduces its overall warming effect by about 30 percent ..."

From the abstract:
"Although greenhouse gases absorb primarily long-wave radiation, they also absorb short-wave radiation. Recent studies have highlighted the importance of methane short-wave absorption, which enhances its stratospherically adjusted radiative forcing by up to ~ 15%. The corresponding climate impacts, however, have been only indirectly evaluated and thus remain largely unquantified. Here we present a systematic, unambiguous analysis using one model and separate simulations with and without methane short-wave absorption. We find that methane short-wave absorption counteracts ~30% of the surface warming associated with its long-wave radiative effects. An even larger impact occurs for precipitation as methane short-wave absorption offsets ~60% of the precipitation increase relative to its long-wave radiative effects. The methane short-wave-induced cooling is due largely to cloud rapid adjustments, including increased low-level clouds, which enhance the reflection of incoming short-wave radiation, and decreased high-level clouds, which enhance outgoing long-wave radiation. The cloud responses, in turn, are related to the profile of atmospheric solar heating and corresponding changes in temperature and relative humidity. Despite our findings, methane remains a potent contributor to global warming, and efforts to reduce methane emissions are vital for keeping global warming well below 2 °C above preindustrial values [what a nonsense!]."

Methane may not warm the Earth quite as much as previously thought The gas absorbs both longwave and shortwave radiation, with competing effects on climate


Look at the scale parts per billion!!! This is cheap alarmism and hysteria! Remember, the life essential trace gas CO2 is measured in parts per million!

Global monthly average of atmospheric methane, 1983–2021



Extended Data Fig. 1: Global maps of the total near-surface air temperature response to methane perturbations


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